Value ofSatellite Remote Sensing (RS) ImageryinFryManagement
Forest resources, a vital part of the earth’s terrestrial ecosystem, create the indispensable conditions and environment for the living of human beings. It counts so much for our country’s economic construction and eco-environment improvement as to how to effectively carry out forest resources investigation and make sure an efficient administration and reasonable exploitation of the resources.
The superiorities of the satellite remote sensing (RS) technology lie in its macroscopic view, dynamic monitoring, and convenient access to information, intuitive images and large-coverage ability. The extensive utilization of high-resolution satellite images in forest resources investigation has begun to gain its social-economic benefits.
The forestry satellite project of the Changguang Satellite Technology, focusing on the core needs of forestry, is an especially designed satellite constellation for forestry RS application.
1.It will provide images of spatial resolution less than 5m and up to 25 spectral channelsand forestry remote sensing data services in terms of forest resources investigation, disaster monitoring, eco-value assessment and other fields.
2.A four-star networking scheme consisted of sun-synchronous orbit, orbital plane and equiphase distribution is applied in the forestry satellite. The revisiting period is short.
3. The minimum interval between two adjacent satellites in networking takes 30 minutes or less to image the same object.
4.Each star has the capability of large side-swayimaging, which can meet the real-time monitoring requests of natural disasters such as floods and fires.
5.19 visible near-infrared spectral bands, including 1 panchromatic band and 18 multi-spectral bands are configured in the forestry satellite; 4 short wave infrared spectral bands, 1 medium wave infrared spectral band and 1 long wave infrared spectral band, of a total of 25 spectral bands.
Forest Fire Prevention
The forestry satellites collected RS imagery makes it possible for us to figure out the fire conditions before it occurs, as a forewarning of scientific fire prevention; identify and locate the fire spot and make quick response according to the assessment of fire behavior; help post-disaster assessment and vegetation recovery monitoring.
1. Forest Resources Investigation
25 spectral bands are configured in the forestry satellite to enable it to extract and distinguish the obtained images via varied reflection spectrums from different trees species, such as the evergreens, aquatic plants, ground flora, deciduous forest and shrub, offering basis for forestry resources investigation and protection.
2.Disease and Pests Monitoring
Multi-spectral remote sensing imagery of forestry satellites is able to identify, extract, analyze the information of forest diseases and pests and offer pre-warning, evaluation, management and control for the forest diseases and pests, providing basis for the forest recourses conservation.
Forestry satellites are enabled to accurately estimate forest vegetation parameters such as chlorophyll content, leaf area index and biomass to foster forest resources management and a healthy and sustainable development of forestry.
Multi-spectral RS data is applied to acquire the status quo, spatial distribution, coverage and dynamic changes information of the forest resources, including its coverage changing and overall tendency based on the establishment and demonstration of a 3D model of the forest.
Wetland RS monitoring and researching can be carried out by means of multi-phase RS imagery. Accurate distribution and dynamic changes data of various wetlands will serve to provide a foundation of scientific decisions for conservation, management and ecological restoration of degraded wetlands to realize the sustainable development of wetland resources.
Forestry satellite RS images can also be used in the surveillance of land desertification. By analyzing the RS data of the same area during different phases, monitoring and statistical analyses of the evolution of the desertification progress can be realized, to provide data basis for desertification prevention.
The standard luminous (nighttime) images are standard sub-meter products collected by Jilin-1 constellation, corrected and calibrated by radiation and sensors. RPC models and metadata files are available in the general tiff format.
The standard optical static image is a standard sub-meter product collected by Jilin-1 constellation, which is corrected and calibrated by radiation and sensors. RPC models and metadata files are available in the general tiff format.
A standard video imagery is a standard video acquired by Jilin-1 constellation, which has a resolution less than 0.9m after being processed through image stabilizing and framing. Products in both avi and mov data formats are provided.